Archive image from page 72 of The cytoplasm of the plant. The cytoplasm of the plant cell cytoplasmofplant00guil Year: 1941 Chapter VII — 57 — The Chondriome acids (method of Benda and Meves) or with a mixture of formol and potassium bichromate (method of Regaud), and then in fol- lowing the fixation with a more or less prolonged treatment of a 3 solution of potassium bichromate, an operation called post- chromatization which renders the chondriosomal lipides insoluble. Once fixed, the chondriosomes stain clearly with iron haematoxylin, acid fuchsin and crystal violet. They appear in the h
Archive image from page 72 of The cytoplasm of the plant. The cytoplasm of the plant cell cytoplasmofplant00guil Year: 1941 Chapter VII — 57 — The Chondriome acids (method of Benda and Meves) or with a mixture of formol and potassium bichromate (method of Regaud), and then in fol- lowing the fixation with a more or less prolonged treatment of a 3 solution of potassium bichromate, an operation called post- chromatization which renders the chondriosomal lipides insoluble. Once fixed, the chondriosomes stain clearly with iron haematoxylin, acid fuchsin and crystal violet. They appear in the homogeneous, barely-stained cytoplasm as intensely stained elements, with a very clear outline and they very much resemble bacteria. It has been shown that chondriosomes are made up of a lipoprotein complex and that their affinity for stains is due to the lipides which they enclose. Fixatives containing alcohol or acetic acid destroy these lipides and the chondriosomes lose their chromaticity. In young cells, mitochondria generally predominate among the chondriosomes. At a later stage they elongate into chondrioconts which is the most usual form found in mature cells. The chondrio- somes are permanent formations and many cytologists consider that they are incapable of forming de novo and increase in number only by division of pre-existing chondriosomes. At first the chondrio- somes were regarded as organelles in whose interior were formed most of the products elaborated in the cell (fat, zymo- gen, pigments) and whose role was the same as that of the plastids in chlorophyll- bearing plants. But observation of living material using tissue-culture technique .. does not confirm this idea. The very accurate observations of Noel on the liver of rats are the only ones made so far which seem favor- able to this belief. Noel has shown that when an exclusively nitro- genous diet is given the rats, the chondriosomes of their liver cells, which are normally in the state of chondriocont
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Keywords: 1940, 1941, archive, atkinson_lenette_may_rogers_1899_, book, bookauthor, bookdecade, bookpublisher, booksponsor, booksubject, bookyear, drawing, guilliermond_alexandre_1876_, historical, history, illustration, image, mblwhoi_library, page, picture, plant_cells_and_tissues, print, protoplasm, reference, vintage, waltham_mass_chronica_botanica_company, zimmermann_a_albrecht_b_1860
